Stevej Posted November 21, 2005 Share Posted November 21, 2005 Question for you guys running LS1s, did your computer require re-programming beyond the base changes to allow it to run in the swapped car? My setup is a stock 2000 Camaro LS1, emissions deleted in the computer, intake and airfilter setup like the LS1 page on JTR, MAF has been de-screened and ends polished up a bit, sanderson headers into 2.5 in. then a Y to 3 in. pipe to a Flowmaster 40 delta. The problem I have is under maybe half to full throttle I get lean pops (that's what they sound like) out the exhaust, flat spots and some studdering in the powerband from about 2k to maybe 3.5k rpm. It's obviously not pulling like it should be in that range. I don't have tuning software yet, I was going to be ordering HPtuners but wanted to wait a bit, thought I'd be able to drive it as is without additional tuning. Has anyone else run into this with a stock motor swap with these minor mods? Should this run well as is (assuming there are problems with any parts)? I thought the computer could accommodate for these minimal mods. Any input would be appreciated. Quote Link to comment Share on other sites More sharing options...
qwik240z Posted November 21, 2005 Share Posted November 21, 2005 Question for you guys running LS1s' date=' did your computer require re-programming beyond the base changes to allow it to run in the swapped car?My setup is a stock 2000 Camaro LS1, emissions deleted in the computer, intake and airfilter setup like the LS1 page on JTR, MAF has been de-screened and ends polished up a bit, sanderson headers into 2.5 in. then a Y to 3 in. pipe to a Flowmaster 40 delta. The problem I have is under maybe half to full throttle I get lean pops (that's what they sound like) out the exhaust, flat spots and some studdering in the powerband from about 2k to maybe 3.5k rpm. It's obviously not pulling like it should be in that range. I don't have tuning software yet, I was going to be ordering HPtuners but wanted to wait a bit, thought I'd be able to drive it as is without additional tuning. Has anyone else run into this with a stock motor swap with these minor mods? Should this run well as is (assuming there are problems with any parts)? I thought the computer could accommodate for these minimal mods. Any input would be appreciated.[/quote'] My setup is just like yours. I had similar problems with mine, popping and studdering. I had some minor exhaust leaks that were causing the problem. Once we replaced the collector gaskets with copper ones the problem was fixed. I hope yours is that easly to fix too. Quote Link to comment Share on other sites More sharing options...
Stevej Posted November 21, 2005 Author Share Posted November 21, 2005 Thanks for that, hopefully that's it. Oddly enough yesterday it blew out one of the collector gaskets . The car has only been driven maybe 40 miles total but hopefully that was the cause the whole time. It doesn't do it when sitting still and revving up but it's had the problem the whole time it's been driven. That was about the only part I didn't actually bolt on myself, the muffler shop did it and probably didn't use the best quality ones. Quote Link to comment Share on other sites More sharing options...
DaleMX Posted November 22, 2005 Share Posted November 22, 2005 Because the collector flange on the Sanderson headers is loose it makes it hard to get it to seal up. I have gone to the soft aluminum gaskets on mine. They will stay tight for about 500 miles now instead of 50. Maybe this next tighten up session (this weekend) will secure them on finally. Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted November 22, 2005 Share Posted November 22, 2005 If I can hijack this thread for a bit, I know you can find vaccum leaks with propane or starter fluid, but how does one track down exhaust leaks like this? Just start torquing bolts? Quote Link to comment Share on other sites More sharing options...
Mikelly Posted November 22, 2005 Share Posted November 22, 2005 Yup... What I do is start it cold, and use my hand around the joints and connections to "feel" leaks. However, with the situation described above, the leak is only under load... That won't work with my way of checking. Other things to check: MAPP sensor is notorious for getting hit and damaged when motors are pulled. check it with an Autotap for codes. Descreening the MASS... Everyone I know who has done that has had to retune with LS1edit Plug wires can also cause this. A faulty plug wire will start to suffer spark loss under load at full operating temps. Good luck. Mike Quote Link to comment Share on other sites More sharing options...
Stevej Posted November 22, 2005 Author Share Posted November 22, 2005 Pulled the plugs last night as I've read on LS1Tech that a cracked plug could cause something like this but no luck, they were all good. Pulled what was left of the collector gaskets last night one blew out completely, the other was in 3 pieces. Start with the gaskets and wanted to do larger plug wires anyway. Might have to buy myslef HPtuners for christmas... Quote Link to comment Share on other sites More sharing options...
Mikelly Posted November 22, 2005 Share Posted November 22, 2005 Don't bother with the 10.5mm Taylor wires. They are Junk. I've had them now for two years and I've broken two and had one lose connection... I'm unimpressed with their quality! Mike Quote Link to comment Share on other sites More sharing options...
maichor Posted November 22, 2005 Share Posted November 22, 2005 I'll have to agree with Mikelly, MAF descreening requires a retune. You wouldn't think so but, it does. A few friends that have done it say just leave it in. Since yours is gone, you may have no other choice than to reprogram. Quote Link to comment Share on other sites More sharing options...
Stevej Posted November 22, 2005 Author Share Posted November 22, 2005 Just replaced the collector gaskets and took a spin but it's still running off a bit. I've read on LS1tech that it can go either way with the MAF, so tuning software it is. That's fine, I planned on getting it at some point, this just accelerates the timeline a bit. Quote Link to comment Share on other sites More sharing options...
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